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RESEARCH AND DEVELOPMENT FUNDING ARRANGEMENTS AND OTHERS (Schedule Of Balances Recorded) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
RESEARCH AND DEVELOPMENT FUNDING ARRANGEMENT [Abstract]    
Embedded Derivatives    $ 12,431us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability
Research and Development Component 421cgen_ResearchAndDevelopmentComponent 758cgen_ResearchAndDevelopmentComponent
Research and development funding arrangement $ 421cgen_ResearchAndDevelopmentFundingArrangement $ 13,189cgen_ResearchAndDevelopmentFundingArrangement